WO2020010649A1

WO2020010649A1 - Direct-drive module for oct

Info

Publication number: WO2020010649A1
Application number: PCT/CN2018/096800
Authority: WO
Inventors: 明伟杰; 李百灵; 高峻; 李柏辉; 梁为亮; 宋李烟
Original assignee: 深圳永士达医疗科技有限公司
Priority date: 2018-07-13
Filing date: 2018-07-24
Publication date: 2020-01-16
Also published as: CN108768122A

Abstract

Disclosed is a brushless direct-current direct-drive motor for an OCT detection device. The motor comprises a permanent magnet, a multi-pole winding stator, a Hall sensor, a motor shell, a direct-drive motor driver and a rotary shaft, wherein the permanent magnet is fixed on the rotary shaft, the rotary shaft is provided with a through hole penetrating the axis of the rotary shaft, the rotary shaft comprises a first rotary shaft end provided with a slip ring adapter interface and a second rotary shaft end provided with a conduit adapter interface; and the multi-pole winding stator, a position sensor and the direct-drive motor driver are fixed on a motor bearing, and the Hall sensor is used for detecting the position of a magnetic pole of the permanent magnet arranged on the rotary shaft relative to the multi-pole winding stator and controls the direction of current introduced into the electric poles of the multi-pole winding stator by means of the direct-drive motor driver. A direct-drive module for an OCT detection device, a driving apparatus for an OCT detection device, and an OCT detection device assembly, which use the brushless direct-current direct-drive motor, are further disclosed. Using the technical solution provided by the present invention can achieve advantages such as simple mechanical structure and easy electrical control to facilitate the assembling and debugging.

Description

Direct drive module for OCT

Technical field

The invention relates to the field of medical equipment, in particular to a brushless DC direct-drive motor applied to OCT equipment, and an OCT direct-drive module and OCT equipment manufactured using the brushless DC direct-drive motor.

Background technique

OCT (Optical Coherence Tomography, optical coherence tomography) medical clinical application equipment needs to be equipped with a catheter probe. From the analysis of the working principle of the probe, the infrared laser of the detection arm needs to drive the prism assembly to the detection point through a high-speed rotating driving device. At the same time, the reflected light of the detection object is received by the prism and returned along the original light path. Each time the guide wire rotates, the infrared light emitted by the prism is equivalent to completing a 360-degree circular scan on a plane perpendicular to the rotation axis. According to the method of OCT optical coherence tomography, the driving device drives the probe catheter to generate a plane image (X, Y axial image) for each revolution of the catheter. The actuator moves back and forth, and the catheter detects the change in the axial (Z-axis) position of the scanning plane, and an X-Y axial plane image corresponding to the Z-axis position will be generated. Obviously, these planar image collections organized in order constitute a three-dimensional image.

The construction of a three-dimensional image requires a driving device that rotates at a high speed. From the above analysis, it is not difficult to get the following formula:

For example, the requirements of a certain clinical test: within 50mm section, the time of catheter withdrawal (moving backward) is guaranteed to be completed within 2.5S. If the driver drives the catheter to rotate at 10 rps (600 rpm) and substitute it into the formula, the image resolution can be calculated to 2mm. With the current OCT technology, the resolution generally achieved in the vertical / horizontal direction (20 μm), obviously the axial resolution is far from the vertical / Horizontal resolution.

From the above analysis, there are two ways to improve the axial resolution:

Increase the speed of the drive, such as 100rps or even higher.

Extend the withdrawal time.

For the second solution, it is often not allowed clinically. Increasing the drive speed is the only option.

With the continuous popularization of OCT technology in medical clinical applications, the development of high-speed drivers is an inevitable result. To achieve high-speed transmission, it is important to choose a suitable transmission method. Traditional mechanical transmission methods include: belt transmission, chain transmission, gear transmission, etc.

However, in order to achieve high speeds above 3000 rpm (50 rps), high-speed gear transmission is a solution. Gear transmission faces higher speed requirements and also encounters technical bottlenecks, which are mainly reflected in the following two aspects:

Speed bottleneck: The gear transmission speed is increased to a certain limit. The problems caused by high speed include mechanical noise and mechanical vibration.

Bottleneck of accuracy: In order to make progress in accuracy and speed, traditional mechanical transmissions have to pay higher manufacturing costs, and the increase in cost and performance are not proportional.

Summary of the invention

In response to the current demand for high-speed driving devices using OCT equipment, the embodiments of the present invention provide brushless DC drive motors for OCT testing equipment, direct-drive modules for OCT testing equipment, driving devices for OCT testing equipment, and OCT testing equipment. .

The brushless DC direct-drive motor for OCT detection equipment provided by the embodiment of the present invention includes a permanent magnet, a multi-pole winding stator, a Hall sensor, a motor bearing shaft, a direct-drive motor driver, and a rotating shaft;

The permanent magnet is fixedly disposed on the rotating shaft, and the rotating shaft is provided with a through hole penetrating the center of the rotating shaft. The rotating shaft includes a first rotating shaft end provided with a slip ring adapter interface and a second rotating shaft end provided with a catheter adapter interface;

The multi-pole winding stator, the Hall sensor and the direct-drive motor driver are fixed on the motor bearing shaft. The Hall sensor is connected to the direct-drive motor driver. The direct-drive motor driver is also connected to the multi-pole winding stator. The permanent magnet on the rotating shaft is located in the multi-pole. The center of the winding stator;

The Hall sensor is used to detect the position of the magnetic poles of the permanent magnets disposed on the rotating shaft relative to the multi-pole winding stator, and the direction of the current input to each electrode in the multi-pole winding stator is controlled by a direct-drive motor driver.

Direct drive technology, as a new transmission technology in the world in the past ten years, has advantages that traditional transmission cannot compare with. Direct drive is to directly connect the direct drive motor to the load under the control of the drive system to achieve direct drive of the load. With this structure, all mechanical transmission components (ball screw pair, rack and pinion, transmission belt / pulley, gear box, etc.) are eliminated, eliminating the backlash, flexibility and related factors caused by mechanical transmission Other issues. The brushless DC direct-drive motor for OCT detection equipment provided by the embodiment of the present invention, by adapting the existing direct-drive motor, sets the rotating shaft of the brushless DC direct-drive motor as a rotating shaft penetrating the axis of the rotating shaft. A through hole for the optical fiber to pass through the center of the brushless DC direct drive motor, and at the same time, in order to match the slip ring adapter and the catheter adapter to better connect the fiber, the shaft is connected to the slip ring adapter correspondingly. A slip ring adapter interface is provided on the first shaft end, and a catheter adapter interface is provided on the second shaft end of the shaft corresponding to the catheter adapter. By reforming the above structure of the brushless DC direct-drive motor, the brushless DC direct-drive motor can be directly applied to the OCT detection equipment, and provide the OCT detection equipment with a power of 360 ° rotation in the axial direction.

Preferably, the brushless DC direct-drive motor further includes a motor housing, a motor front disk, and a motor rear disk. The motor front disk and the motor rear disk are provided with through holes in the center for the shaft to pass through, and the motor front disk is from the first shaft end. It is fixed on the motor casing, and the rear end of the motor is fixed on the motor casing from the second rotating shaft end. The front end of the motor and the back end of the motor are matched with the motor casing to form a protective shell of the brushless DC direct-drive motor. The multi-pole winding stator, permanent magnets, shafts, etc. inside the motor can be sealed in the protective casing. The external environment affects the precise cooperation and work of the motor, and also avoids the operator's injury from the high-speed rotating shaft and permanent magnets.

In a specific embodiment, the slip ring adapter interface includes a first stepped shaft and a second stepped shaft provided from an end surface of the first rotating shaft, and an outer diameter of the first stepped shaft is smaller than an outer diameter of the second stepped shaft. . The outer diameter of the first stepped shaft is smaller than that of the second stepped shaft, and the first stepped shaft can be inserted into the connection port of the slip ring adapter, and the second stepped shaft provides a limit function.

The catheter adapter interface includes a third stepped shaft and a fourth stepped shaft provided from an end surface of the second rotation shaft, and an outer diameter of the fourth stepped shaft is smaller than an outer diameter of the third stepped shaft; An interface for the catheter adapter connector to be snapped in, and the fourth stepped shaft is provided with a side wall through hole that penetrates the fourth stepped side wall. At the same time, an optical communication module is provided at the side wall through hole for receiving a light control signal.

The embodiment of the present invention also provides a direct drive module of the OCT detection equipment, including a motor base, a fiber slip ring, a slip ring adapter, a catheter adapter, and the above-mentioned brushless DC direct drive motor, the fiber slip ring and the brushless DC direct drive motor. It is fixedly installed on the motor base. The input end of the optical fiber slip ring is connected to the optical fiber. The output end of the optical fiber slip ring is connected to the optical fiber input end of the optical fiber connection slip ring adapter. The slip ring adapter is connected to the shaft of the brushless DC direct drive motor through the slip ring adapter interface. The synchronous rotation is performed. The catheter adapter is connected to the catheter adapter interface through the SG flange. The optical fiber passes through the through hole provided on the axis of the shaft and is connected to the catheter adapter through the catheter adapter interface.

The direct-drive module of the OCT detection equipment provided by the embodiment of the present invention abandons the traditional method driven by a motor and drives the rotating shaft to rotate through a transmission component, and uses a modified brushless DC direct-drive motor suitable for OCT detection equipment. At this stage, it has become possible to achieve a speed above 6000 rpm. Using direct drive technology can easily achieve speed control and precise positioning on the device. The transmission system reduces mechanical transmission parts, reduces wear, increases equipment life, and saves energy. At the same time, it saves the raw materials and manufacturing costs of parts, thereby reducing the overall cost of the equipment. At the same time, with the development of direct drive motor manufacturing technology, the direct drive module of OCT detection equipment using brushless DC direct drive motor can achieve higher speed, more precise speed control and precision controllability. It is an OCT detection equipment. Achieve better detection performance.

Preferably, a code wheel is further included, and the code wheel is fixed on the slip ring adapter.

An embodiment of the present invention further provides a driving device for an OCT detection device, including the direct-drive module of the OCT detection device described above, and a linear guide module. The linear guide module includes a slide table, a linear guide, a stepper motor, and a stepper. Motor driver, the sliding table is fixedly connected to the motor base, the guide direction of the linear guide is set along the longitudinal direction of the motor base, and the stepper motor is connected to the sliding table through the transmission mechanism;

The stepper motor is used to drive the slide table to move along the linear guide. The stepper motor driver is used to receive the control signal and drive the stepper motor to work according to the control signal.

The driving device of the OCT detection equipment provided by the embodiment of the present invention realizes high-speed rotation along the rotation axis by 360 degrees through a direct drive module, and longitudinally moves back and forth along the rotation axis through a linear guide module.

At the same time, the embodiment of the present invention also provides an OCT detection device, which includes a bracket and the driving device of the OCT detection device as described above. A linear guide and a stepping motor are fixed on the bracket. The catheter adapter is connected through a catheter socket through a catheter.

The embodiments of the present invention use the principle of direct drive technology to develop a brushless DC direct drive motor specifically for use in OCT applications. A direct drive module and a linear guide module are combined to form a complete OCT testing equipment driving device. The device successfully solves the technical problems caused by high-speed transmission. At the same time, due to the mechatronics structural design, simple mechanical structure and electrical control, and convenient assembly and debugging, it provides a convenient way to accelerate the development and application of OCT equipment.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic structural diagram of a brushless DC direct-drive motor for OCT detection equipment according to an embodiment of the present invention; FIG.

2 is a schematic structural diagram of a direct drive module of an OCT detection device according to an embodiment of the present invention;

FIG. 3 is a schematic structural diagram of a driver in an OCT detection device according to an embodiment of the present invention.

In the drawings: 100, brushless DC direct drive motor; 110, rotating shaft; 111, through hole; 112, first stepped shaft; 113, second stepped shaft; 114, third stepped shaft; 115, fourth stepped shaft; 116, interface; 117, side wall through hole; 120, motor housing; 200, optical communication module; 300, direct drive module; 310, motor base; 320, optical fiber slip ring; 330, slip ring adapter; 340, catheter adapter ; 350, light source fiber; 360, SG flange; 370, switch baffle; 410, sliding table; 420, linear guide; 430, stepper motor; 440, stepper motor driver; 500, bracket; 510, conduit socket .

detailed description

In the following, the present invention is further described with reference to the drawings and specific embodiments. It should be noted that, under the premise of no conflict, the embodiments described below or technical features can be arbitrarily combined to form a new embodiment. .

With the development of OCT technology, higher requirements have been placed on the driving devices of OCT detection equipment, especially higher requirements for servo motors and transmission mechanisms that drive OCT catheter probes for high-speed rotation. However, there are still technical bottlenecks in the servo motors and transmission mechanisms currently used in OCT detection devices driven by OCT catheter probes, despite a number of improvements. On the one hand, as speed increases, mechanical noise is brought about, and mechanical vibration becomes difficult to control. On the other hand, the increase in performance has resulted in a significant increase in manufacturing costs.

In order to solve the technical bottleneck brought by the existing OCT detection equipment when higher speed is required, the technical solution provided by the present invention takes a different approach. By studying the emerging direct drive technology in the past decade, the brushless DC direct drive motor has been optimized. And improvement, it makes it perfectly solve the requirements of OCT testing equipment for higher speed development. At the same time, it also provides an important development direction for the driving technology of OCT inspection equipment.

Example:

As shown in FIG. 1, a brushless DC direct-drive motor 100 for an OCT detection device according to an embodiment of the present invention includes a permanent magnet (not shown), a multi-pole winding stator (not shown), and a Hall sensor (not shown). (Illustrated), a motor bearing shaft (not shown), a direct drive motor driver (not shown), and a rotating shaft 110. Among them, permanent magnets, multi-pole winding stators, Hall sensors, and direct-drive motor drivers have mature application schemes in DC direct-drive motors, and the technical scheme provided by the present invention has no limitation on its structure.

The permanent magnet is fixed on the rotating shaft 110. The rotating shaft 110 is provided with a through hole 111 penetrating the center of the rotating shaft 110. The rotating shaft 110 includes a first rotating shaft end provided with a slip ring adapter interface and a second rotating shaft end provided with a catheter adapter interface. Among them, the permanent magnet and the rotating shaft 110 can be formed integrally to increase the mechanical strength of the rotating shaft 110.

The multi-pole winding stator, the Hall sensor, and the direct-drive motor driver are fixed on the motor bearing shaft. The Hall sensor is connected to the direct-drive motor driver. The direct-drive motor driver is also connected to the multi-pole winding stator. The permanent magnets on the rotating shaft 110 are located in the multiple The center of the pole winding stator.

The Hall sensor is used to detect the position of the magnetic pole of the permanent magnet disposed on the rotating shaft 110 with respect to the multi-pole winding stator, and control the direction of the current input to each electrode in the multi-pole winding stator through a direct drive motor driver. The multi-pole winding stator is connected to a direct current power source through a direct-drive motor driver, and the direct-drive motor driver controls the direction and magnitude of the current passing through each electrode winding to change the direction and magnitude of the magnetic field generated by the multi-pole winding stator. The Hall sensor is provided with an electromagnetic induction device, such as a magnetic sensor, to judge the magnetic pole of the electromagnetic field by sensing the direction of the electromagnetic magnetic force. The position sensor transmits the sensed magnetic pole direction information of the permanent magnet to the direct drive motor driver. The direct drive motor driver will change the direction of the magnetic field generated by each electrode winding by changing the current direction of each electrode winding according to the information sensed by the position sensor. Generates an electromagnetic field opposite to the poles of the permanent magnets, and uses the principle of attracting the opposite poles of the magnets to drive the permanent magnets to move, thereby driving the rotating shaft to rotate. At the same time, the direct drive motor driver also controls the strength of the generated magnetic field by controlling the current input to each electrode winding according to the control signal, thereby controlling the rotation speed of the rotating shaft.

Direct drive technology, as a new transmission technology in the world in the past ten years, has advantages that traditional transmission cannot compare with. Direct drive is to directly connect the direct drive motor to the load under the control of the drive system to achieve direct drive of the load. With this structure, all mechanical transmission components (ball screw pair, rack and pinion, transmission belt / pulley, gear box, etc.) are eliminated, eliminating the backlash, flexibility and related factors caused by mechanical transmission Other issues. The brushless DC direct-drive motor 100 for OCT detection equipment provided by the embodiment of the present invention has been adapted to the existing direct-drive motor, and the shaft 110 of the brushless DC direct-drive motor 100 is set to penetrate the shaft 100 The shaft through-shaft through hole 111 is used for the optical fiber to pass through the center of the brushless DC direct-drive motor 100. At the same time, in order to match the slip ring adapter 330 and the catheter adapter 340 to better connect the optical fiber, A slip ring adapter interface is provided on the first shaft end of the shaft 110 corresponding to the slip ring adapter 330, and a catheter adapter interface is provided on the second shaft end of the shaft 110 corresponding to the catheter adapter 340. Through the modification of the above structure of the brushless DC direct-drive motor 100, the brushless DC direct-drive motor 100 can be directly applied to the OCT detection equipment, and provide the OCT detection equipment with 360-degree rotation power in the axial direction.

At the same time, the use of brushless DC direct-drive motors has the following advantages:

1. Low interference: brushes are removed from the brushless motor, without considering the life of the brushes and replacing the brushes regularly. When the motor is running, no electric spark is generated, which greatly reduces the interference of the electric spark to the surrounding radio equipment.

2. Low noise and smooth operation. The brushless motor has no brushes, the friction is greatly reduced during operation, the operation is smooth, and the noise will be much lower. This advantage is particularly applicable to environments with low noise requirements. This will have a better experience for OCT testing equipment as a medical testing equipment.

3. Long life and low maintenance cost: From a mechanical point of view, the brushless motor is almost a maintenance-free motor. When necessary, you only need to do some dust removal maintenance.

Preferably, the brushless DC direct-drive motor 100 further includes a motor housing 120, a motor front disk, and a motor rear disk. The center of the motor front disk and the motor rear disk is provided with a through hole for the rotation shaft to pass through. The rotating shaft end is fixed on the motor housing 120, and the rear end plate of the motor is fixed on the motor housing 120 from the second rotating shaft end. The front end of the motor and the rear end of the motor are matched with the motor casing 120 to form a protective casing of the brushless DC direct-drive motor 100, which can seal the multi-pole winding stator, permanent magnets, shafts, etc. inside the motor. Not only does the external environment affect the precise cooperation and work of the motor, but also avoids the operator's injury caused by the high-speed rotating shaft and permanent magnets.

In a specific embodiment, the slip ring adapter interface includes a first stepped shaft 112 and a second stepped shaft 113 provided from an end surface of the first rotation shaft, and an outer diameter of the first stepped shaft 112 is smaller than the second stepped shaft. 113 outer diameter. The outer diameter of the first stepped shaft 112 is smaller than that of the second stepped shaft 113, and the first stepped shaft 112 can be inserted into the connection port of the slip ring adapter 330, and the second stepped shaft 113 provides a limit function.

The catheter adapter interface includes a third stepped shaft 114 and a fourth stepped shaft 115 provided from an end surface of the second rotating shaft, and an outer diameter of the fourth stepped shaft 115 is smaller than an outer diameter of the third stepped shaft 114; The side of the stepped shaft 114 is provided with an interface 116 for the joint of the catheter adapter 340, and the fourth stepped shaft 115 is provided with a side wall through hole 117 penetrating the side wall of the fourth stepped shaft 115. At the same time, an optical communication module 200 is provided at the side wall through hole 117 for receiving a light control signal.

As shown in FIG. 2, an embodiment of the present invention further provides a direct drive module 300 of an OCT detection device, which includes a motor base 310, an optical fiber slip ring 320, a slip ring adapter 330, a catheter adapter 340, and the above-mentioned brushless DC direct drive motor. 100, fiber slip ring 320 and brushless DC direct drive motor 100 are fixed on the motor base 310. The input end of the fiber slip ring 320 is connected to the optical fiber 350, and the output end of the fiber slip ring 320 is connected to the fiber input end of the fiber connection slip ring adapter 330. The slip ring adapter 330 is connected to the rotating shaft 110 of the brushless DC direct drive motor 100 through a slip ring adapter interface and performs synchronous rotation movement. The catheter adapter 340 is connected to the catheter adapter interface through the SG flange 360, and the optical fiber passes through the shaft 100 axis. The through hole 111 of the heart is connected to the catheter adapter 340 through the catheter adapter interface. Among them, the optical fiber slip ring 320 can realize the uninterrupted transmission of optical signals between the rotating components such as the slip ring adapter 330, the brushless DC direct drive motor 100, and the stationary components such as the light source optical fiber 350.

The direct-drive module 300 of the OCT detection equipment provided by the embodiment of the present invention abandons the traditional method driven by a motor and drives the rotating shaft to rotate through a transmission component, and adopts a modified brushless DC direct-drive suitable for OCT detection equipment. It is possible for the motor 100 to achieve a rotation speed above 6000 rpm at this stage. Using direct drive technology can easily achieve speed control and precise positioning on the device. The transmission system reduces mechanical transmission parts, reduces wear, increases equipment life, and saves energy. At the same time, it saves the raw materials and manufacturing costs of parts, thereby reducing the overall cost of the equipment. At the same time, with the development of direct drive motor manufacturing technology, the direct drive module 300 using the OCT detection equipment of the brushless DC direct drive motor 100 can achieve higher speed, more precise speed control and controllable accuracy. Inspection equipment achieves better inspection performance.

Preferably, a code wheel is further included, and the code wheel is fixed on the slip ring adapter 330.

As shown in FIG. 3, an embodiment of the present invention further provides a driving device for an OCT detection device, including the direct-drive module 300 of the OCT detection device described above, and a linear guide module. The linear guide module includes a slide table 410, a linear The guide rail 420, the stepper motor 430 and the stepper motor driver 440, the slide table 410 is fixedly connected to the motor base 310, the guide direction of the linear guide rail 420 is set along the longitudinal direction of the motor base 310, and the stepper motor 430 is connected to the slide table 410 through a transmission mechanism;

The stepper motor 430 is used to drive the slide table 410 to move along the linear guide 420, and the stepper motor driver 440 is used to receive the control signal and drive the stepper motor 430 to work according to the control signal. For example, the steering and rotation speed of the stepping motor 430 and the stroke of the stepping motor 430 are controlled, so as to control the speed, direction and stroke of the direct drive module 300 moving on the linear guide 420. At the same time, a switch baffle 370 can also be provided between the slide table 410 and the motor base 310. The switch baffle is used to trigger the photoelectric switches at both ends to realize zero position detection and travel limit safety insurance.

The driving device of the OCT detection equipment provided by the embodiment of the present invention realizes high-speed rotation along the rotation axis 360 degrees through the direct drive module 300, and moves longitudinally forward and backward along the rotation axis 100 through the linear guide module.

As shown in FIG. 3, an embodiment of the present invention further provides an OCT detection device, which includes a bracket 500 and the driving device of the OCT detection device as described above. The linear guide 420 and the stepping motor 430 are fixed on the bracket 500. The front end of the bracket 500 corresponds to a catheter adapter. A conduit socket 510 is provided at position 340. The OCT probe passes through the conduit socket 510 and is connected to the conduit adapter 340 through the conduit. The SG flange 360 is used to achieve a stable connection with the rotating shaft 110. The catheter socket 510 is used to limit the OCT probe, and the catheter adapter 340 is driven to rotate through the rotating shaft 100, thereby driving the catheter connected to the catheter adapter 340 to rotate at high speed, thereby driving the OCT probe to rotate at high speed.

The embodiment of the present invention uses the principle of direct drive technology to develop a brushless DC direct drive motor 100 specifically for use in the OCT application field. Combined with the direct drive module 300 and the linear guide module, a complete OCT testing equipment drive device is formed. The device successfully solves the technical problems caused by high-speed transmission. At the same time, due to the mechatronics structural design, simple mechanical structure and electrical control, and convenient assembly and debugging, it provides a convenient way to accelerate the development and application of OCT equipment.

The foregoing embodiments are merely preferred embodiments of the present invention, and the scope of protection of the present invention cannot be limited by this. Any non-substantial changes and substitutions made by those skilled in the art on the basis of the present invention belong to the present invention. Claimed scope.

Claims

A brushless DC direct-drive motor for OCT testing equipment, which includes permanent magnets, multi-pole winding stators, Hall sensors, motor bearing shafts, direct-drive motor drives, and rotating shafts;

The permanent magnet is fixedly disposed on the rotating shaft, and the rotating shaft is provided with a through hole penetrating the center of the rotating shaft. The rotating shaft includes a first rotating shaft end provided with a slip ring adapter interface and a conduit adapter interface. Second shaft end

The multi-pole winding stator, a Hall sensor, and a direct-drive motor driver are fixed on the motor bearing shaft. The Hall sensor is connected to the direct-drive motor driver, and the direct-drive motor driver is also connected to the multi-pole winding. A stator, the permanent magnet on the rotating shaft is located at the center of the multi-pole winding stator;

The Hall sensor is used to detect a position of a magnetic pole of a permanent magnet disposed on the rotating shaft with respect to a multi-pole winding stator, and control the direction of current input to each electrode in the multi-pole winding stator through the direct drive motor driver.
The brushless DC direct-drive motor for OCT detection equipment according to claim 1, further comprising a motor housing, a motor front disk, and a motor rear disk, the motor front disk and the motor rear disk A through hole is provided in the center for the shaft to pass through, the front end plate of the motor is fixed to the motor housing from the first end of the shaft, and the rear end plate of the motor is fixed to the motor housing from the end of the second shaft.
The brushless DC direct drive motor for OCT testing equipment according to claim 1 or 2, wherein the slip ring adapter interface comprises a first stepped shaft and a second stepped shaft provided from an end surface of the first rotation shaft. An outer diameter of the first stepped shaft is smaller than an outer diameter of the second stepped shaft.
The brushless DC direct drive motor for OCT detection equipment according to claim 3, wherein the catheter adapter interface comprises a third stepped shaft and a fourth stepped shaft provided from an end surface of the second rotating shaft, and The outer diameter of the fourth stepped shaft is smaller than the outer diameter of the third stepped shaft; the side of the third stepped shaft is provided with an interface for the catheter adapter connector to snap, and the fourth stepped shaft is provided at a side that runs through the fourth stepped side wall. Wall through hole.
The brushless DC direct drive motor for OCT detection equipment according to claim 4, wherein an optical communication module is disposed at the side wall through hole, and the optical communication module is used for receiving an optical control signal.
A direct drive module of an OCT detection device, comprising a motor base, a fiber slip ring, a slip ring adapter, a catheter adapter, and the brushless DC direct drive motor according to any one of claims 1 to 4, wherein the fiber slide The ring and the brushless DC direct-drive motor are fixedly connected to the motor base. The input end of the optical fiber slip ring is externally connected to the light source fiber. The output end of the optical fiber slip ring is connected to the optical fiber input end of the optical fiber connection slip ring adapter. Connect the rotating shaft of the brushless DC direct-drive motor through the slip ring adapter interface and make synchronous rotation motion. The conduit adapter is connected to the conduit adapter interface through the SG flange, and the optical fiber passes through the rotating shaft. The through hole of the heart is connected to the catheter adapter through the catheter adapter interface.
The direct drive module of the OCT detection device according to claim 6, further comprising a code disc, the code disc being fixed on the slip ring adapter.
The driving device of the OCT testing equipment further includes a direct drive module of the OCT testing equipment according to claim 6 or 7, further comprising a linear guide module, and the linear guide module includes a slide table, a linear guide, a step The motor and the stepper motor driver, the slide table is fixedly connected to the motor base, the guide direction of the linear guide is arranged along the longitudinal direction of the motor base, and the stepper motor is connected to the slide table through a transmission mechanism;

The stepper motor is used to drive the slide table to move along the linear guide, and the stepper motor driver is used to receive a control signal and drive the stepper motor to work according to the control signal.
An OCT detection device, comprising a bracket and the OCT detection device driving device according to claim 8, the linear guide and stepper motor are fixed on the bracket, and the front end of the bracket is provided corresponding to the position of the catheter adapter. There is a catheter socket, and an OCT probe passes through the catheter socket and is connected to the catheter adapter through a catheter.